最近比较晕了,博客经常给朋友f5不停的刷新了,这个让一个空间根据搞不定呀,后来网上整理了一些防止刷新的代码才得己解决,下面来看到整理的代码吧,希望这些例子对你有帮助.
搬家到阿里云的头两天头痛了,主机配置低,尼玛的wp的需求高,F5几下就刷死了,你让俺情何以堪,以前用过的主机配置哪有这么逊的,就不吐槽阿里云了,说不定当你看到这里的时候,这个站还在阿里云这蹲着呢.
下面附上一段代码,防止频繁的刷新导致数据库吃紧....
方式NO.1,代码如下:
<?php
session_start();
$k=$_GET['k'];
$t=$_GET['t'];
$allowTime = 1800;//防刷新时间
$ip = get_client_ip();
$allowT = md5($ip.$k.$t);
if(!isset($_SESSION[$allowT]))
{
$refresh = true;
$_SESSION[$allowT] = time();
}elseif(time() - $_SESSION[$allowT]>$allowTime){
$refresh = true;
$_SESSION[$allowT] = time();
}else{
$refresh = false;
}方式NO.2,代码如下:
<?php
//Changed by www.phprm.com
session_start();
$allow_sep = "2";
if (isset($_SESSION["post_sep"]))
{
if (time() - $_SESSION["post_sep"] < $allow_sep)
{
exit("请不要频繁刷新，休息2秒再刷新吧");
}
else
{
$_SESSION["post_sep"] = time();
}
}
else
{
$_SESSION["post_sep"] = time();
}方式NO.3,代码如下:
<?php
session_start();
if(!emptyempty($_POST[name])){
$data = $_POST[name];
$tag = $_POST[tag];
if($_SESSION[status]==$tag){
echo $data;
}else{
echo "不允许刷新！";
}
}
$v = mt_rand(1,10000);
<form method="post" name="magic" action="f5.php"><input type="hidden"
name="tag" value="<?=$v"><input type=text name="name"><input type="submit" value="submit">
</form>//开源代码phprm.com
<?php
echo $v;
$_SESSION[status] = $v;有何妙用？？你猜呢 呵呵 有用到的拿去吧
注意:代码有了,不过要应用到WordPress还要一些其他操作.
因为上面的代码是基于 session的验证,假设你在2秒内刷新了页面,那么他会执行exit() 函数输出一条消息,并退出当前脚本,于是就不会加载下面的内容,所以这段代码最好放在header中,先让代码执行,再加载其他的东西.
如果把代码放在了footer里,结果整个页面都加载了只在最后一行输出了“请不要频繁刷新”,放在header中,效果比较好,想看效果的话按两下F5 吧.
当然最好的是采用的是新建一个php文件,然后在header调用.
这样做的好处有两个:
一个是修改功能代码方便,不用每次都打开header文件,也不怕误改了其他地方的代码,二是一旦出错,可以快速修改并检查,甚至可以直接删除文件,代码如下:
<?php include('includes/forbiddenCC.php'); <!DOCTYPE html>
这里呢要注意下,必须调用在所有页面的最前面.
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